Title page for etd-0825110-134259


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URN etd-0825110-134259
Author Tsung-hao Tsai
Author's Email Address genius010432@yahoo.com.tw
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Department Communications Engineering
Year 2009
Semester 2
Degree Master
Type of Document
Language English
Title Selective Cooperation for Dual-Hop Cooperative Communication Networks
Date of Defense 2010-07-30
Page Count 55
Keyword
  • cooperative thresholds
  • amplify-and-forward
  • decode-and-forward
  • direct transmission
  • Abstract In cooperative communications systems, multiple relays selection scheme and adaptive relay selection scheme are usually adopted. In both schemes, the system makes selections based on instantaneous channel status. However, such schemes have an extremely high computational complexity. In particular, when the channels experience fast fading, the systems do not have sufficient to make a correct decision.
    In this thesis, statistical channel properties are utilized in deciding whether cooperative transmission should be adopted or not. In our investigations, the cooperative mechanism includes direct transmission (DT), decode-and-forward (DF) relaying and amplify-and-forward (AF) relaying. The Ergodic capacity is adopted throughout the theoretical analyses. In addition, a number of approximated thresholds are derived to assist the decision process.
    Simulation experiments are conducted to verify the derived results. It is shown that the proposed transmission scheme using the cooperative thresholds is effective in deciding when the cooperative communication is necessary.
    Advisory Committee
  • Char-Dir Chung - chair
  • Chao-Tang Yu - co-chair
  • Ding-Bing Lin - co-chair
  • Chin-Liang Wang - co-chair
  • Chih-Peng Li - advisor
  • Files
  • etd-0825110-134259.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2010-08-25

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